Combination saw and square



Feb. 7, 1928. 1,658,175

A'. L. sEARLE COMBINATION SAW AND SQUARE Filed Nov. 10. 1925 VIIIIIIII':

Ill/ll!!! Patented Feb. 7, 1928.

UNITED STATES 1,658,175 PATENT OFFICE.

ARTHUR L. SEARLE. OF METHUEN, MASSACHUSETTS.

COMBINATION SAW AND SQUARE.

Application filed November This invention relates to attachments for carpenters saws.

It is substantially a double-angle bevel square combined with a wood saw.

The device is particularly useful for cutting roofing timbers, as when the angles for the plumb cut and scarf cut of a hip roof have been determined, both can be set on the saw and can be used either for a right or left pitch without the necessity of putting aside the saw or bringing out a bevel square.

In the drawings, Fig. 1 is an elevation showing a saw with my device attached and set at one angle;

Fig. 2 shows a similar saw with a slight modification of the device set at two diti'erent angles;

Fig. 3 is a section on line 33 of Fig. 2;

Fig. l is a partial detail in section showing the pivot construction as on line l1 of Fig. 1;

Fig. 5 is a detail in section showing a modification of the setting means;

Fig. 6 is an elevation of a modification; and

Fig. 7 is a sectional view of Fig. 6.

In Figs. 2 and 3, A represents the blade of a saw having opposite the teeth 10 the straight edge 11.

B is the handle which has the usual handhole 20. IVhere the handle adjoins the blade it has an abutment the side edges of which are preferably cut at the top 22 at an angle of with straight edge 11, and at the bottom 21 at an angle of 90 with straight edge 11.

Through the saw blade A are pierced the two curved setting slots 12 and 14, and, as shown in Figs 2 and 3, between these is a straight pivot slot 13 from which at an angle is also an extension slot 15.

The main feature of my de ice is the pivoted double-angle arm comprising two straight-edged sections F and G, each of which straddles the saw blade A. Section F has two legs 6 and 7 one on each side of a slot 8 as shown in Fig. 3. Section G is formed of two strips 16 and 17 one on each side of blade A. The legs or strips of each section are of sufiicient length to allow great freedom of movement from the pivot 31 which passes through pivot slot 13, and joins the two sections together. As shown in Fig. 3, I may use the round nut 9 on the end of pivot 34.

Through each leg of section F passes a 10, 1925. Serial No. 68.103.

longitudinal slot 30, and through section (i passes a longitudinal lOI 12.

"lhrongh slots and 11 passes an adjusting bolt 31. on the end of which is a locking lever 36 which works on the principle of those used in a bevel square, by turning which the pivot is locked in position, and through lOKS and 12 passes an adjusting bolt 33, on the end of which is a locking lever 3.).

it will be readily seen that if a forty-iivc degree cut and a ninety degree out are desired, the members F and (Jr can be moved back again t 2; and 21, and locked by 36 and and thus tl.c.-e angles can be used.

If a 90 angle and another angle is desired, the parts can be adjusted asshown in Fig. 2. If a single angle is desired, the parts can be adjusted as shown in Fig. 1. If an angle of extreme acuteness is desired. the pivot 31 can be pushed up, over and back into slot 15, and such an angle can be obtained. As a rule however, the radius of action is not so extreme but what section G can be set for one'cut, and F for a different cut.

As shown in Figs. 1 and 4, instead of using a locking lever on the pivot, I can connect the two sections 50 and 51, which correspond with F and G, by two headed rivets 52, 52, entirely omitting the pivot slot 13. Slots 53 and 54 correspond with 30 and 32, and slots 27 and 28 correspond with 14 and 12. Saw blade K has teeth 25 and a straight edge 26. Handle B is the same as in Fig. 2.

Instead of a locking lever I may, as shown in Fig. 5, in place of either 35 or 36 or nut 9, have a bolt 61 on which screws the nurled nut which may be partly countersunk as shown. This may be used in place of 34.

By having my sections straddle the saw blade, I can use either of the angles at which they are set for a right-hand cut or a lefthand cut.

The principal feature of my device is the double-angle arm which may be applied in several ways. It may preferably straddle the blade, but as shown in Figs. 6 and 7, may be on one side only.

In this construction M is the saw blade with a straight edge not shown, while N and P are the two sections which are mortised together at 73 and 74; and through these parts, and also through hole 72 in blade M, passes a bolt having a head 71 and the locking lever 75.

\Vith this construction any two angles can be set, but it cannot be used for right and left cuts, as can the straddle construction. The only hole through the saw blade is at 72, the setting slots such as 27, 28, or 12 and 14, being entirely omitted.

I claim:

1. The combination with a saw having a blade with one straight edge and a handle having on each side an abutment part of which is at an angle of ninety degrees and the other part forty-five degrees with the straight edge, said blade having two curved setting slots, and a pivot slot between them; of a double-angle arm comprising two straight-edge sections, each of which straddles the saw blade, said sections being pivoted together by a pivot which passes through and is slidable in the pivot slot and can be fixed in position therein, each arm having a longitudinal slot; and adjusting bolts each of which passes through an arm slot and through a setting slot whereby the arms can be fixed in adjusted position.

2. The combination with a saw having a blade with one straight edge, said blade having two curved setting slots; of a doubleangle arm comprising two straight-edge sections, each of which straddles the saw blade, said sections being pivoted together, each arm having a longitudinal slot; and adjusting bolts each of which passes through an arm slot and through a setting slot whereby the arms can be fixed in adjusted position.

3. The combination with a saw having a blade with one straight edge; of a doubleangle arm comprising two straight-edge sections, each of which straddles the saw blade, said sections being pivoted together; and means whereby the arms can be fixed in adjusted position whereby four angles may be formed between the respective straight-edge sections and the straight edge of the saw blade.

4. The combination with a saw having a blade with one straight edge; of a doubleangle arm comprising two straight-edge sections; and means whereby the arms can be fixed in adjusted position whereby a plurality of angles may be formed between the straight-edge sections and the straight edge of the saw blade.

ARTHUR L. SEARLE. 

